For any building containing residences not more than one story in height, the area of an inner court shall not be less than 225 square feet and the minimum dimension of such inner court shall not be less than 15 feet.

For any building containing residences more than one story in height, the area of an inner court shall not be less than 400 square feet and the minimum dimension of such inner court shall not be less than 20 feet.

No court regulations shall apply to single- and two-family detached residences.